Technical description and composition of the BBK 24LEM-1004 TV, type of panel and applicable modules. The composition of the modules.BBK LED
Model: 24LEM-1004 / T2C
Panel: C236X13-E4-C (G2
T-CON: V236BJ1-XC01
LED driver (backlight): integrated into PSU
Power Supply (PSU): AY034D-2HF
MainBoard: JUC7.820.00085101
IC MainBoard: MSB101A, EN25F40, GD25Q64, H5TQ1G63EFR, YD1517P
Tuner: DT21WN-2A-E
Technical Specifications 24LEM-1004 / T2C
BBK 24LEM-1004
General repair guidelines for TV LCD LED
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, and there is not the slightest sign of operability - the most likely malfunction is in the power module. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the BBK 24LEM-1004 TV does not have an image, but there is sound, a malfunction in the backlight circuits of the LED panel C236X13-E4-C (G2.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its 25Q64BSIG 1517P MSB101A chips and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
The malfunction of the tuner DT21WN-2A-E is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Remember! Attempts to self-repair by users of the BBK 24LEM-1004 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
The appearance of the MainBoard JUC7.820.00085101 is shown in the figure below:JUC7.820.00085101
JUC7.820.00085101 can be used in TVs:
BBK 22LEM-3082/FT2C (Panel C215X14-E2-P(G2)), BBK 24LEM-1004/T2C (Panel C236X13-E4-C(G2), BBK 19LEM-1004/T2C (Panel C185X14-E3-P (G2)), BBK 19LEM-1001/T2C (Panel M185X12-E1-P (G4) ), ROLSEN RL-19E1308T2C (Panel C185X14-E3-P(G2)), ROLSEN RL-22E1308FT2C (Panel C215X14-E2-P(G2)), ROLSEN RL-24E1302T2C (Panel C236X13-E2-C (G2) ).
The appearance of the power supply
Main features of the BBK 24LEM-1004 device:
Installed matrix (LED-panel) C236X13-E4-C (G2.
The matrix control uses the Timing Controller (T-CON) V236BJ1-XC01.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the BBK 24LEM-1004 TV is carried out by the power module AY034D-2HF, or its analogs.
MainBoard - the main board (motherboard) is a JUC7.820.00085101 module, using microchips MSB101A, EN25F40, GD25Q64, H5TQ1G63EFR, YD1517P and others.
Tuner DT21WN-2A-E provides the reception of television programs and tuning to channels.
BBK 24LEM-1004 / T2C LED TV with C236X13-E4-C LCD monitor (G2, 24 "(61 cm) diagonal size 16: 9 format. The required screen brightness 200 cd / m² is provided by LED backlight LED. Maximum ratio brightness to minimum (contrast) is 3000: 1. This model uses side illumination from Edge LEDs. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. eskaya processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:.. MP3, WMA, MKV, JPEG Stereo realized by two built-in speakers using audio NICAM STEREO processing system..
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768. The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C MPEG4, DVB-T2 standards.
Overall dimensions: With a support of 576x388x180 mm, Without a support of 576x350x56 mm.
TV Weight: 4 kg.
Attention! The C236X13-E4-C panel (G2 of the BBK 24LEM-1004 / T2C LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
